Cita APA

Porter, M. E. (1990). The competitive advantage of nations. New York: Free Press.

Chicago Style Citation

Porter, Michael E. The Competitive Advantage of Nations. New York: Free Press, 1990.

Cita MLA

Porter, Michael E. The Competitive Advantage of Nations. New York: Free Press, 1990.

Atenció: Aquestes cites poden no estar 100% correctes.